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By red
#403249
Roadrunner71 wrote:
Sat Apr 14, 2018 10:50 pm
I have wondered for a very long Time why Hang-Glider designers have never designed a FLEX - WING that was both a Topless design, and also a Bottomless Wing? I presume that the main objection to a Fully Cantilevered Flex wing would be weight. How about it? does anyone have the answer that I am seeking?
Think about it: A Flex - Wing Sans rigging that need to be moved through the Air.
Roadrunner,

Is this your glider? 8)

It is cantilevered, it has struts, no top wires, no crossbar, and a single surface sail. It was intended to be the next generation of Albatross, the ASG-23. The "super-noseplate" and struts carried all the flying loads nicely. The cost of the "super-noseplate" prevented production.

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By Lazypilot
#403312
In contemplating the design of a glider to build for myself I think that cantilever is the way to go.

A wire braced structure will give the best strength to weight ratio, but since I will launch with most of the glider's weight supported by a wheel I don't mind if it is heavier than current gliders.

I don't mind making multiple trips from the truck to the set-up or breakdown area, so having the glider in 3 or 4 pieces is Ok with me.

I'm lazy and don't want to make any more parts than necessary. So I'm thinking the glider will have a fuselage, a fin/rudder, and a horizontal tail/elevator, and a right and left wing. Even being old and worn out I should be able to carry these components by myself.

I should note here that my glider won't be a hang glider. I want a comfy seat and aerodynamic controls. And the wings won't be swept. If I feel like it I'll make it look like a Spitfire or Mustang, or maybe something else entirely.
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By red
#403313
Lazypilot wrote:
Sat Apr 21, 2018 3:52 am
I should note here that my glider won't be a hang glider. I want a comfy seat and aerodynamic controls. And the wings won't be swept. If I feel like it I'll make it look like a Spitfire or Mustang, or maybe something else entirely.
Lazypilot,

If this design is to be an ultralight glider under (USA) FAA FAR Part 103, there is a maximum stall speed limit.

https://www.usua.org/Rules/faa103.htm

It would not be easy to stay within the limits, using any high-speed design as a starting point. Something like a scaled-up Carbon Dragon may be possible, especially with a small motor to allow more weight.
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